docs: def get_reference_line_numeration_marker_patterns(prefix=u''):
      """Return a list of compiled regex patterns used to search for the marker
         of a reference line in a full-text document.
         @param prefix: (string) the possible prefix to a reference line
         @return: (list) of compiled regex patterns.
      """
      title = u""
      if type(prefix) in (str, unicode):
          title = prefix
      g_name = u'(?P<mark>'
      g_close = u')'
      space = ur'\s*'
      patterns = [
          # [1]
          space + title + g_name + ur'\[\s*(?P<marknum>\d+)\s*\]' + g_close,
          # [<letters and numbers]
          space + title + g_name +
          ur'\[\s*[a-zA-Z:-]+\+?\s?(\d{1,4}[A-Za-z:-]?)?\s*\]' + g_close,
          # {1}
          space + title + g_name + ur'\{\s*(?P<marknum>\d+)\s*\}' + g_close,
          # (1)
          space + title + g_name + ur'\<\s*(?P<marknum>\d+)\s*\>' + g_close,
          space + title + g_name + ur'\(\s*(?P<marknum>\d+)\s*\)' + g_close,
          space + title + g_name + ur'(?P<marknum>\d+)\s*\.(?!\d)' + g_close,
          space + title + g_name + ur'(?P<marknum>\d+)\s+' + g_close,
          space + title + g_name + ur'(?P<marknum>\d+)\s*\]' + g_close,
          # 1]
          space + title + g_name + ur'(?P<marknum>\d+)\s*\}' + g_close,
          # 1}
          space + title + g_name + ur'(?P<marknum>\d+)\s*\)' + g_close,
          # 1)
          space + title + g_name + ur'(?P<marknum>\d+)\s*\>' + g_close,
          # [1.1]
          space + title + g_name + ur'\[\s*\d+\.\d+\s*\]' + g_close,
          # [    ]
          space + title + g_name + ur'\[\s*\]' + g_close,
          # *
          space + title + g_name + ur'\*' + g_close,
      ]
      return [re.compile(p, re.I | re.UNICODE) for p in patterns]